Question Drawing ecliptic orbits with LineRenderer.

Hello, I'm working on a solar system project. I use the Line Renderer to draw the orbits. I have some problems: at the corners, the orbits are drawn thinner than necessary and the orbits are drawn on top of the planets. Is this a bug on my end or is this how the Line Renderer works? How can I fix this? Or is there another way to draw elliptical orbits? Thank you.